Top Definition
when a guy acts like a bitch for several days on end and does so on a regular basis but is an alright person most of the time similar to when a girl is pmsing
dave "hey brian is complaining about not feeling well and doesn't want to go to the bar tonight"
mike "yeah he is on his manstral cycle
by Jeeves724 June 09, 2009
5 Words related to Manstral Cycle

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